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A kind of preparation method and application of hollow hyperbranched carbon material

A technology of hyperbranched carbon and carbon-based materials, which is applied in the energy field to achieve the effects of improving electrochemical performance, high specific surface area, and reducing contact resistance

Active Publication Date: 2022-08-02
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above considerations, using a simple method to prepare three-dimensional multi-scale hollow carbon materials can effectively improve the performance of carbon-based electrode materials. However, hollow hyperbranched carbon materials have not been reported, and the unique hyperbranched hollow structure will endow carbon materials with better performance. electrochemical performance

Method used

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  • A kind of preparation method and application of hollow hyperbranched carbon material
  • A kind of preparation method and application of hollow hyperbranched carbon material
  • A kind of preparation method and application of hollow hyperbranched carbon material

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Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 , the preparation method of the hollow hyperbranched carbon material comprises the following steps:

[0040] (1) Synthesis of ZIF-8 nanoparticles

[0041] ZIF-8 nanoparticles were prepared by a simple precipitation method.

[0042] Dissolve 0.8 g of zinc nitrate in 50 ml of methanol to obtain solution A, and at the same time, dissolve 0.8 g of 2-methylimidazole in 50 ml of methanol to obtain solution B. Subsequently, solution A and solution B were mixed and stirred for 1 min, and the mixed solution was left to react at 4°C for 24 h. After the reaction, the product is centrifuged, washed, and dried in vacuum to obtain the product ZIF-8 nanoparticles.

[0043] (2) Synthesis of hollow hyperbranched glucose-derived carbon-based materials

[0044] Hollow hyperbranched glucose-derived carbon-based materials were prepared by a one-step hydrothermal reaction.

[0045] 0.1 g of ZIF-8 nanoparticles and 1.6 g of glucose were ultrasonically dispersed and diss...

Embodiment 2

[0051] The hollow hyperbranched carbon material obtained in Example 1 is used as an electrode material to be applied to a supercapacitor, and the specific steps are as follows:

[0052] The hollow hyperbranched carbon material, carbon black and PTFE were weighed in a mass ratio of 8:1:1 and mixed with ethanol to obtain a slurry. Then, the mixed slurry was pressed on the surface of the nickel foam, and the load was obtained after drying in an oven. about 2mg cm –2 the working electrode.

[0053] The electrochemical performance of the hollow hyperbranched carbon material was tested in a standard three-electrode cell. The nickel foam loaded with the hollow hyperbranched carbon material was the working electrode, the Pt sheet was the counter electrode, Hg / HgO was the reference electrode, and 6M KOH was used. for the electrolyte. CV test voltage range is -1 to 0V, scan rate is 10 to 200mV s –1 . The GCD test voltage range is -1 to 0V, and the charge and discharge current densit...

Embodiment 3

[0057] Synthesis of Hollow Hyperbranched Carbon Materials

[0058] (1) Synthesis of ZIF-8 nanoparticles

[0059] ZIF-8 nanoparticles were prepared by a simple precipitation method.

[0060] Dissolve 0.8 g of zinc nitrate in 50 ml of methanol to obtain solution A, and at the same time, dissolve 0.8 g of 2-methylimidazole in 50 ml of methanol to obtain solution B. Subsequently, solution A and solution B were mixed and stirred for 1 min, and the mixed solution was left to react at 3°C ​​for 12 h. After the reaction, the product is centrifuged, washed, and dried in vacuum to obtain the product ZIF-8 nanoparticles.

[0061] (2) Synthesis of hollow hyperbranched glucose-derived carbon-based materials

[0062] Hollow hyperbranched glucose-derived carbon-based materials were prepared by a one-step hydrothermal reaction.

[0063] 0.1 g of ZIF-8 nanoparticles and 1.0 g of glucose were dispersed and dissolved in 40 ml of deionized water by ultrasonic dispersion. Subsequently, the mix...

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Abstract

The invention relates to a preparation method and application of a hollow hyperbranched carbon material. The preparation process of the hollow hyperbranched carbon material is as follows: (1) preparing ZIF-8 nanoparticles by a precipitation method; (2) preparing ZIF-8 nanoparticles A hollow hyperbranched glucose-derived carbon-based material was prepared by one-step hydrothermal treatment with glucose; (3) the hollow hyperbranched glucose-derived carbon-based material was carbonized at high temperature into a hollow hyperbranched carbon material. The preparation method of the invention is simple, the hollow hyperbranched structure can be built through one-step hydrothermal reaction, and the final product hollow hyperbranched carbon material has high specific surface area, large volume cavity and ultra-thin carbon wall, and can effectively prepare electrode materials. Reduce contact resistance and effectively improve electrochemical performance when applied to supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of energy, and relates to a preparation method and application of a hollow hyperbranched carbon material, in particular to the preparation of a hollow hyperbranched carbon material and its application as an electrode material in energy storage devices. Background technique [0002] In recent years, the rapid development of electric vehicles, information technology, intelligent equipment and other fields has put forward the strategic requirements of large capacity, high efficiency and long life for energy storage and conversion devices, and electrode materials are the key factors affecting the above performance. Due to their excellent electrical transport properties and highly active surfaces, carbon materials are not only important energy storage materials, but also can build energy transport networks and play an important role in electron transport and regulating interfacial reactions in energy devices based...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/86
CPCH01G11/32H01G11/86Y02E60/13
Inventor 纪律律朱滢滢王晟王騊
Owner ZHEJIANG SCI-TECH UNIV
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